Spark Plug; Throttle Override System (T.o.r.s.) - Yamaha VK540EF Service Manual

IGNITION SYSTEM

SPARK PLUG

1. Remove:
D Spark plugs
2. Measure:
D Spark plug gap
Standard spark plug:
BR9ES (NGK)
Spark plug gap:
0.7 X 0.8 mm (0.028 X 0.031 in)

THROTTLE OVERRIDE SYSTEM (T.O.R.S.)

If the carburetor or throttle cable should mal-
function during operation, T.O.R.S. will operate
when the throttle lever is released.
T.O.R.S. is designed to interrupt the ignition and
keep the engine revolutions between 2,800 and
3,000 r/min if the carburetor fails to return to idle
when the lever is released.
WARNING
D If T.O.R.S. operates, make sure that the
cause of the malfunction is corrected and
that the engine can be operated without a
problem before restarting the engine.
D Be sure to use the standard resistance-
type spark plug and spark plug cap. Other-
wise, T.O.R.S. will not work properly.
A
Status
Idling
or
Switch
starting
Throttle
OFF
switch
Carburetor
ON
switch
Engine Running Running
1 Carburetor switch
2 Throttle switch
3 Throttle cable
4 Throttle stop screw
a ON
b OFF
7-5
ELEC
B C
Running Trouble
ON OFF
OFF OFF
T.O.R.S.
operating